Washington: This year Americans will not be able to enjoy Christmas party in view of coronavirus. A top coronavirus adviser to President-elect Joe Biden delivered a stern holiday message to Americans on Thursday - "no Christmas parties" - and warned they face a COVID-19 siege for weeks to come despite the latest moves toward U.S. government approval of a vaccine. Americans might have to skip the Christmas parties this year even though COVID-19 vaccines are on the cusp of regulatory approval. America's COVID-19 cases and fatalities are skyrocketing right now, and despite relentless efforts, the officials are struggling to get it under control. In view of corona pandemic,A member of Biden's coronavirus advisory board, Osterholm told CNN, "The next three to six weeks at minimum ... are our COVID weeks. It won't end after that, but that is the period right now where we could have a surge upon a surge upon a surge." He further said that it would be several months before the nation sees widespread availability of vaccines, the first of which cleared a key U.S. regulatory hurdle on Thursday. Also Read: US Executes Brandon Bernard Despite Objections From Several Jurors In His Trial Indian-American Raja Chari selected for NASA's manned Moon mission Sanofi, GSK Covid-19 vaccine will not be ready until the end of 2021